Steam, hydraulic, and like valve



July 19, 1932. T F Y ET AL 1,868,059.

STEAM, HYDRAULIC, AND LIKE VALVE Filed Aug. 28. 1931 3 Sheets-Sheet 1July 19, 1932.; T. F. GRAY ET AL STEAM, HYDRAULIC, AND LIKE VALVE 1931 5Sheets-Sheet Filed Aug. 28

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July 19, 1932. T. F. GRAY ET AL.

STEAM; HYDRAULIC, AND LIKE VALVE Filed Aug. 28, 1931 3 Sheets-Sheet 3.

Patented July 19, 1932 UNITED STATES TOM FREDERICK GRAY AND EDGAR ANDREWBOLTON, oE ADSWOOD, STOCKPOR'I, ENG- LAND, ASSIGNORS T0 VICTORY VALVESLIMITED, OF ADSWOOD, STOCKPORT, ENG

LAND, A BRITISH COMPANY Application filed August 28, 1931, Serial No.559,983, and in Great Britain April 30, 1931.

This invention relates to steam, hydraulic and like valves, andparticularly to valves of the type having an internal cover piece uponthe valve body, such cover piece when removed leaving a gap or aperturewhich serves for the inspection, the insertion and the withdrawal of thevalve and seat.

Our present invention comprises the provision of an improvedconstructionand arrangement of the cover piece and its securing meanswhich strengthen the valve body against any distortion at the said gapor aperture and allow of the ready refacing of the cover piece to ensurea good joint with the valve body.

Referring to the accompanying explanatory drawings Figure 1 is a partsectional elevation, Figure 2 a sectional plan view on the line 2-2 ofFigure 1, and Figure 3 an elevation looking from right to left of Figure1 showing a parallel slide valve having our invention applied thereto. 7

Figure 4 is a view similar to Figure 3 but with the external plates bywhich theinternal cover piece is held in position, removed. Figure 5 isan elevatlon of one of the ex I ternal plates looking from left to rightof Figures 1 and 2. v

The same reference letters in the different views indicate the sameparts.

The internal cover piece a is held in position by two bolts 6, 0 whichpass through two plates d, e which are of substantially circular form inplan with a flat part f (see Figure 5) where the two plates come againstone another when in position on the valve body. Each of the plates cl, 6has a ridge or band 9 of wedge shape in section which projects from theplate at one side around and adjacent to the circular edge and suchridge or band enters a groove or recess h in the valve body 2' aroundthe gap or aperture j closed by the internal cover piece a. As eachgroove or recess is of annular or circular form, it can be readilymachined inthe body and the ridge or band 9 upon each plate be made agood fit therein to ensure that when the'bolts b and a holding thecoverplate a in position are tightened, the body of the valve around thecover plate apertures is gripped by the external plates (Z and e,'andtherebystrengthened against distortion by a movement tending to causeeither contraction or expansion of the body of the aperture.'

The aperture 7' closed by the internal cover piece a is of ellipticalshape or has parallel sides and rounded ends-as shown, with the two partcircular grooves it around its edge as before described. 7

Each of the external plates cl, e has one of the bolts or 6 extendingtherethrough. The cover piece ahas a groove is across its face intowhich the bolt heads 6 0 project and detachable "strips m upon the coverpiece serve to hold the bolts in such grooves, profducing in effectundercut or T grooves at ing an internal cover piece upon an aperture inthe valve body, the arrangement wherein the cover piece is held inposition by bolts passing through two external plates, each of thelatter having a ridge or band of wedge shape in cross section and of acircular form projecting from'one side thereof and entering acorresponding groove or recess in the valve body around the apertureclosed by the cover piece whereby the valve body is strengthened at suchaperture against both :expansion and contraction.

' 2. In valves as claimed in claim 1,.the formation of eachexternalplate of circular shape with a fiat side at the part wherethe two platescome against oneanother when in position on the valve body.

3. In valves'as claimed in claim 1, the provision of a slot in the coverpiece and of detachable strips at each side of said slot, to receive theheads of the securing bolts of the loo covel: piece and to enable thecover piece jginting face to be trued on a flat surface p ate. 7 7 v Intestimony whereof we have signed 'our 5 names mthiszsggeifioatiom. 7

- 'FREDERICK GRAY? V EDGAR ANDREWv BOLTON-F V

